jthe plant was shut down and the decision — made to condition it for storage "as is" rather than dismantle the equipment. Task Group 7.1 personnel had been phased out in accordance with the status of their respective projects. Most of the UCRL personnel departed following the third and fourth detonations, some from Task Unit 13 departed after the fifth shot, and most of the Task Unit 2 and Task Unit 3 personnel left late in April. Those remaining personnel from Headquarters, JTF SEVEN, and from Task Groups 7.1, 7.3, and 7.4 were returned as expeditiously as was possible after 14 May. PACDIVMATS furnished additional aircraft dur- ing this period in order to support the increased movement requirements. The ships and aircraft of Task Group 7.3 and the aircraft of Task Group 7.4 were returned to their proper stations following the completion of their respective missions in the forward area to complete the CASTLE roll-up. The total cost figure for Operation CASTLE from 1 January 1953 to 31 May 1954 was $96,097,649. This compares favorably with the total cost figure of $65,933,163 for a similar period during Operation IVY (9 July 1951 - 31 December 1952) in view of the increase in experimental programs, the number of shots, and the overall complexity of the Operation-—-CASTLE over IVY. The fol- lowing table presents the operating costs, capital costs, and total costs of the DOD and AEC experimental and support programs for Operation CASTLE: 153